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以某型号大型飞行器为背景，提出了建立大型飞行器六自由度仿真模型的一般原则和方法，综合考虑了飞行器质心运动、绕质心运动、控制系统动态特性、发动机摆动惯性、推进剂晃动、弹性振动及它们之间的铰链耦合等因素对飞行器运动的影响，重新推导了质心运动和绕质心运动数学模型，建立了全量、全干扰、三通道、大姿态条件下时变非线性六自由度仿真模型，经计算机仿真及飞行试验证明该模型是正确的，比传统的三自由度模型更加完善、精确和有效。
Taking a large aircraft as a background, the general principle and method of establishing a six-degree-of-freedom simulation model for a large aircraft are proposed. The general principles and methods for establishing a six-degree-of-freedom simulation model for a large aircraft are put forward. Considering the mass center motion, the centroid motion, the dynamic characteristics of the control system, engine inertia, propellant sway, And their coupling between the hinges and other factors on the aircraft movement, the mathematical model of centroid motions and centripetal motions is deduced again, and a time-varying nonlinear six-degree-of-freedom simulation model under full-mass, full-jamming, After computer simulation and flight test, the model is proved to be correct and more perfect, accurate and effective than the traditional three-degree-of-freedom model.